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Autor Calvo Padilla, María Luisa |
Documentos disponibles escritos por este autor (133)
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Rodrigo Martín-Romo, José Augusto ; Alieva, Tatiana Krasheninnikova ; Calvo Padilla, María Luisa | The Optical Society Of America | 2009-03-30A flexible optical system able to perform the fractional Fourier transform (FRFT) almost in real time is presented. In contrast to other FRFT setups the resulting transformation has no additional scaling and phase factors depending on the fracti[...]![]()
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Mondal, Pronab K. ; Chevalier del Río, Margarita ; Calvo Padilla, María Luisa | SPIE--The International Society for Optical Engineering | 1990We define a resolution criterion for the case of two narrow line images. For doing so, we have considered the two lines as superposition of gradients of two Heaviside step-functions.![]()
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Fernández Álvarez-Estrada, Ramón ; Calvo Padilla, María Luisa ; Juncos del Egido, Purificación | Taylor and Francis, Ltd. | 1980The scattering of electromagnetic waves by dielectric cylinders and, in particular, by optical fibres is studied through integral equations. The convergence of the iterations of the integral equations is established under certain conditions. The[...]![]()
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Pedraza Velasco, María Lourdes de ; Calvo Padilla, María Luisa | The Optical Society Of America | 1993-07-20A mathematical model that describes a fiber-to-fiber holographic connector is presented. We consider both single- and double-image cases for the reconstruction of the second hologram. A comparative study of the two coupling conditions is present[...]![]()
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We study anisotropic cylindrical dielectric waveguides under the following conditions: (1) their cross section ? has arbitrary shape; (2) the dielectric permittivity tensor ? has discontinuities at the boundaries, as well as a graded spatial var[...]![]()
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Martínez Matos, Óscar ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Rodrigo Martín-Romo, José Augusto ; Monte Muñoz de la Peña, Francisco del | Maik Nauka, Interperiodica, Springer-Verlag | 2007-12The advances in the sol-gel holographic recording materials, namely in the photopolymerizable compositions and photorefractive glasses, are reviewed. A new sol-gel holographic material is also discussed that exploits diffusion of a high-refracti[...]![]()
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We present an application of the analysis of light propagation in optical waveguides using the dynamic programming technique. We have obtained results for the transit time light pulse propagated in periodically segmented waveguides. Different se[...]![]()
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Herrero-Bermello, Alaine ; Villafranca Velasco, Aitor ; Podmore, Hugh ; Cheven, Pavel ; Schmid, Jens H. ; Janz, Siegfried ; Calvo Padilla, María Luisa ; Xu, Dan-Xia ; Scott, Alan ; Lee, Regina | SPIE - International Society for Optical Engineering | 2018Spatial heterodyne Fourier transform (SHFT) spectroscopy is based on simultaneous interferometric measurements implementing linearly increasing optical path differences, hence circumventing the need for mechanical components of traditional Fouri[...]![]()
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Limeres, J. ; Calvo Padilla, María Luisa ; Lakshminarayanan, Vasudevan ; Enoch, Jay M. | SPIE--The International Society for Optical Engineering | 2003We propose a new stress-sensing technique based upon measurement of light scattering produced by an array of birefringent waveguides. When external; stress is applied to the array of waveguides, their optical properties are modified via the phot[...]![]()
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Martínez Matos, Óscar ; Vaveliuk, Pablo ; Moraes, Fernando Jorge Sampaio ; Fumeron, Sebastien ; Calvo Padilla, María Luisa | Optical Society of America | 2010-06A q-plate is a stratified medium composed of a uniaxial nematic liquid crystal with an inhomogeneous orientation of the optical axis possessing a topological charge q, which looks promising as a switching device. This work reports an approach to[...]![]()
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Villafranca Velasco, Aitor ; Hernández Garay, María de la Paz ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Monte Muñoz de la Peña, Francisco del | Society of Photo-Optical Instrumentation Engineers (SPIE) | 2011In this work we analyze the optical quality, performance, and recording mechanism of holographic diffraction gratings recorded in photopolymerizable sol-gel glasses. These classes of holographic photomaterials have various compositions, one of w[...]![]()
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Cheben, Pavel ; Calvo Padilla, María Luisa ; Belenguer Dávila, Tomás ; Núñez Peral, Armonía | Elsevier Science BV | 1998-03-01A novel method of substrate mode hologram (SMH) design and fabrication is presented. The coupling between a homogeneous plane wave and an arbitrary free propagating wave is achieved via a total internally reflected (TIR) wave. The input slanted [...]![]()
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Bock, Przemek J. ; Cheben, Pavel ; Villafranca Velasco, Aitor ; Schmid, Jens H. ; Delâge, André ; Florja?czyk, Miros?aw ; Lapointe, Jean ; Xu, Dan-Xia ; Vachon, Martin ; Janz, Siegfried ; Calvo Padilla, María Luisa | Wiley-V C H Verlag Gmbh | 2013-11A planar waveguide Fourier-transform spectrometer with densely arrayed Mach-Zehnder interferometers is demonstrated. Subwavelength gratings are used to produce an optical path difference without waveguide bends. The fabricated device comprises o[...]![]()
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Se presenta una revisión de las teorías de la difracción de ondas electromagnéticas por redes de volumen. En el enfoque de este trabajo se encuentran las teorías de los siguiente grupos: teorías de ondas acopladaseorías modales, teorías de dispe[...]